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Codeforces Round 950 (Div. 3)
2 days
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Difficulty:
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implementation
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2667
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2845
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2441
373A
Collecting Beats is Fun
implementation
900
x10370
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5372
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5959
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x615
370B
Berland Bingo
implementation
1300
x2476
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6304
369A
Valera and Plates
greedy
,
implementation
900
x10829
368A
Sereja and Coat Rack
implementation
1000
x7389
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4290
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x749
366B
Dima and To-do List
brute force
,
implementation
1200
x6734
366A
Dima and Guards
implementation
1100
x4485
365B
The Fibonacci Segment
implementation
1100
x14063
365A
Good Number
implementation
1100
x17568
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4615
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x193
363C
Fixing Typos
greedy
,
implementation
1400
x13105
363A
Soroban
implementation
800
x10512
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1658
362B
Petya and Staircases
implementation
,
sortings
1100
x13526
361A
Levko and Table
constructive algorithms
,
implementation
800
x16276
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2024
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8397
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x387
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1956
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7619
357B
Flag Day
constructive algorithms
,
implementation
1400
x8054
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6722
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x401
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1231
356B
Xenia and Hamming
implementation
,
math
1900
x1889
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4437
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9279
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4752
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2180
353A
Domino
implementation
,
math
1200
x17920
352B
Jeff and Periods
implementation
,
sortings
1300
x15891
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24758
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2730
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6470
350A
TL
brute force
,
greedy
,
implementation
1200
x16024
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13546
349A
Cinema Line
greedy
,
implementation
1100
x28878
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9162
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8800
344A
Magnets
implementation
800
x112910
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13130
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3987
342A
Xenia and Divisors
greedy
,
implementation
1200
x12174
340C
Tourist Problem
combinatorics
,
implementation
,
math
1600
x4127
339B
Xenia and Ringroad
implementation
1000
x66899
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x200346
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x110
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2378
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x9895
334A
Candy Bags
implementation
1000
x18114
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1863
332E
Binary Key
dp
,
greedy
,
implementation
2400
x298
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x7840
332A
Down the Hatch!
implementation
1300
x3535
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x163
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x171
331D1
Escaping on Beaveractor
dfs and similar
,
implementation
2400
x200
331B1
Shave Beaver!
implementation
1700
x718
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1340
330A
Cakeminator
brute force
,
implementation
800
x27566
328A
IQ Test
implementation
1800
x1960
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x40266
325A
Square and Rectangles
implementation
1500
x2138
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3556
319B
Psychos in a Line
data structures
,
implementation
1900
x4038
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7395
317B
Ants
brute force
,
implementation
2000
x1550
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x164
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x165
315B
Sereja and Array
implementation
1200
x6862
314A
Sereja and Contest
implementation
1600
x2061
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5534
313B
Ilya and Queries
dp
,
implementation
1100
x41761
313A
Ilya and Bank Account
implementation
,
number theory
900
x53951
312A
Whose sentence is it?
implementation
,
strings
1100
x4878
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4001
306A
Candies
implementation
800
x6608
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2423
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2036
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4646
304B
Calendar
brute force
,
implementation
1300
x2926
303B
Rectangle Puzzle II
implementation
,
math
1700
x1333
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7726
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7834
302A
Eugeny and Array
implementation
800
x8936
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x22025
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5147
298B
Sail
brute force
,
greedy
,
implementation
1200
x13609
298A
Snow Footprints
greedy
,
implementation
1300
x10544
295A
Greg and Array
data structures
,
implementation
1400
x16173
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x308
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